"We need to have proper trial evidenced and that level of evidence is no where near being reached for medicinal marijuana."

Police have confirmed they do not intend to charge the parents with any offences at this stage.

According to Ms Walker’s social media accounts, she believes her child's condition was caused by vaccines and fears hospital food will kill him.

In a post to her Facebook page on April 26, Ms Walker confesses to having stopped vaccinating their son at age two because it gave him seizures.

She also said it caused him to develop "spastic, quadriplegic cerebral palsy and undiagnosed, uncontrolled epilepsy".

In a video, which appears to have been filmed outside John Hunter Hospital in Newcastle, an emotional Ms Walker accuses police and the medical industry of “corruption”.

The boy (right) was taken from the Lady Cilento Children's Hospital by his parents. (Supplied) ()

“I’m overwhelmed with the fact that people can just stand there and watch a mother’s heart breaking and tears and trying to protect their own and they say, ‘We’ve got to listen to the doctors’,” she said in the video.